The Metropolitan Railway (MR) and District Railway (DR) had, by 1876, built most of the Inner Circle (now the Circle line), reaching Aldgate and Mansion House respectively. The companies were in dispute over the completion of the route as the DR was struggling financially and the MR was concerned that completion would affect its revenues through increased competition from the DR in the City area. City financiers keen to see the line completed, established the Metropolitan Inner Circle Completion Railway in 1874 to link Mansion House to Aldgate. Forced into action, the MR bought out the company and it and the DR began construction of the final section of the Inner Circle in 1879. The new section of railway included two new stations: Tower of London tube station and another located close to the Monument. The station at Monument opened with the name "Eastcheap" on 6 October 1884, after the nearby street, and was renamed "The Monument" on 1 November 1884. Initially, trains from both companies served the station on the Inner Circle service but other operational patterns have been used. The Inner Circle service achieved a separate identity as the Circle line in 1949 although its trains were still provided by the District or Metropolitan lines.
The station is named after the 202 foot high Monument to the Great Fire of London (1666). This is the tallest free standing stone column in the world. The significance of the height is that is the distance to the Pudding Lane bakery where the fire started. The station has cash machines, wi-fi, payphones, and Euro cash machines. From 0400 Saturday 14 March until 1800 Friday 30 July 2021, buses towards Liverpool Street are diverted due to to the closure of Arthur Street to facilitate upgrade work at Bank Station. The station has cash machines, Euro cash machines, wi-fi and payphones.
Connections: Central, Northern, Waterloo & City (at Bank) and Circle Line. London Buses routes 8, 11;15, 21, 23, 25, 26, 40, 43, 76, 133, 141, 242 and 388 and heritage route 15H and night routes N8, N11, N21, N26, N76, N133, N550 and N551.